A 39-year-old man who was driving the van was arrested. He was suspected of going to the neighborhood armed and trying to settle a score after just getting out of prison. It's believed someone shot back at the man, Milwaukee Police Chief Ed Flynn said.

According to the criminal complaint, officers went to Burton's home on North 34th Street to discuss the shooting. Court documents said officers noticed a strong odor of urine and feces throughout the residence.

Officer said Burton lived at the home with seven children, ages 2-11, and five dogs.

An officer noted that insects were found in nearly every room of the home and the home did not have a refrigerator. Police said the living room floor was covered with 10 garbage bags filled with dirty clothes and insects.

An agent with the Wisconsin Department of Corrections terminated the search of the home due to the overpowering smell, according to the complaint.

A city of Milwaukee inspector immediately closed and condemned the home.

"The toilets were not functioning. They were not usable, and one of the bathtubs was full of black old dirty water and was unable to be used," Department of Neighborhood Services Enforcement Supervisor Erica Lewandowski said.

Lewandowski said those violations alone would have been enough to board up the house, but they didn't stop there.

"In this case, due to the conditions that we found, being that it was unsanitary, it did have a roach infestation as well as feces throughout the home, the defective plumbing, the lack of smoke detectors, the lack of carbon monoxide detectors, and an obstructed egress, it clearly rose to the level where we just could not leave the individuals in the property," Lewandowski said.

In 2012, Burton was charged with child abuse. She admitted to whipping three children with an electrical cord. She had just gotten the kids returned to her when last week's shooting happened.

Burton now faces up to nine months in prison for each of the seven misdemeanor child neglect charges against her. She is scheduled to return to court Aug. 11.